i965: Move compression decisions before brw_reg_from_fs_reg().

brw_reg_from_fs_reg() needs to know whether the instruction will be
compressed or not.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95370
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
1 file changed